Wedge-shaped locking expansion bolt capable of being turned over

Abstract

The utility model discloses a turnover wedge-shaped locking expansion bolt which comprises a screw rod, a wedge-shaped locking expansion bolt body and a wedge-shaped locking expansion bolt body. The counter-force end cap is provided with a first end face and a second end face which are opposite, the first end face is obliquely arranged, and the first end of the screw is connected to the first end face; the movable sleeve is movably arranged on the screw in a sleeving mode, the inner diameter of the movable sleeve is larger than the outer diameter of the screw, the outer diameter of the movable sleeve is matched with the outer diameter of the counter-force end cap, the movable sleeve is provided with a third end face and a fourth end face which are opposite to each other, and the third end face is obliquely arranged and abuts against the first end face; the pressing and abutting nut is screwed to the screw rod, and the pressing and abutting nut presses and abuts against the fourth end face so that the counter-force end cap and the movable sleeve can be arranged in a staggered mode; and the retaining nut is screwed at the second end of the screw rod, and the retaining nut is propped against one end, far away from the movable sleeve, of the pressing and propping nut to prevent the pressing and propping nut from retreating. The expansion bolt solves the problems that an existing expansion bolt is difficult to disassemble, and a wall is prone to being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a reusable wedge-locking expansion bolt. Background Art

[0002] At present, the expansion bolts used in building construction include a screw rod, a nut and an expansion sleeve. The end of the screw rod is a frustum head, and one end of the expansion sleeve is slotted for expansion deformation. When in use, the nut is tightened, and the frustum head is pressed into the expansion sleeve, forcing it to expand and deform and supporting in the installation hole to achieve the purpose of fastening.

[0003] However, the commonly used expansion bolts utilize the metal deformation of the expansion sleeve, resulting in difficult disassembly when not in use, easy damage to the wall during disassembly, and inability to be reused after forced removal, causing waste of resources.

[0004] On the other hand, in order to meet the requirements of deformation and expansion during use, the expansion sleeve should not be too thick. After being eroded or under load for many years, its durability decreases, and safety accidents are likely to occur.

[0005] The information disclosed in this background art section is only intended to enhance the overall understanding of the present utility model and should not be regarded as an admission or any form of suggestion that this information constitutes prior art already known to those of ordinary skill in the art. Summary of the Utility Model

[0006] To overcome the defects of the prior art, a reusable wedge-locking expansion bolt is provided to solve the problems of difficult disassembly of existing expansion bolts and easy damage to the wall.

[0007] To achieve the above object, a reusable wedge-locking expansion bolt is provided, including:

[0008] A screw rod having opposite first and second ends;

[0009] A reaction end cap having opposite first and second end faces, the first end face being inclined, and the first end of the screw rod being connected to the first end face;

[0010] A movable sleeve movably sleeved on the screw rod, the inner diameter of the movable sleeve being larger than the outer diameter of the screw rod, the outer diameter of the movable sleeve being adapted to the outer diameter of the reaction end cap, the movable sleeve having opposite third and fourth end faces, the third end face being inclined, the inclination angle of the third end face being adapted to the inclination angle of the first end face, and the third end face abutting against the first end face;

[0011] A pressing nut is screwed onto the screw rod, and the pressing nut presses against the fourth end face to misalign the reaction end cap and the movable sleeve;

[0012] A locking nut is screwed onto the second end of the screw rod, and the locking nut abuts against one end of the pressing nut away from the movable sleeve to prevent the pressing nut from retreating.

[0013] Furthermore, a bearing flange is formed by extending the outer edge of the fourth end face of the movable sleeve, and the pressing nut presses against the bearing flange.

[0014] Furthermore, a gasket is provided between the pressing nut and the locking nut.

[0015] The beneficial effect of the present utility model is that the reusable wedge-locking expansion bolt of the present utility model utilizes the cooperation of the screw rod, the movable sleeve and the pressing nut to control contraction and relaxation. With the wedge-shaped inclined end face between the movable sleeve and the reaction end cap as the core structure, when the two are tightened against the inclined end cap, they are mutually expanded and misaligned, forming frictional fixation with the inner wall of the expansion bolt hole. When relaxed, the screw rod can be easily removed by gently hitting it inward, forming a reusable wedge-locking expansion bolt.

[0016] The reusable wedge-locking expansion bolt of the present utility model is a more convenient, reliable and reusable expansion bolt, which solves the problems of difficult disassembly of traditional expansion bolts at the construction site, easy damage to the wall and waste of resources. The standardized assembled design not only makes the assembly operation simple during processing, firm and reliable during use, easy and non-destructive during disassembly, but also can meet the requirements of reusable, conforms to the concept of green sustainable development, and can be applied to various fastening operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects and advantages of the present application will become more apparent:

[0018] Figure 1 It is a schematic structural diagram of the reusable wedge-locking expansion bolt according to an embodiment of the present utility model.

[0019] Figure 2 It is an exploded structural diagram of the reusable wedge-locking expansion bolt according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will further elaborate on the present application with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than limiting the utility model. Additionally, it should be noted that for the sake of description, only the parts related to the utility model are shown in the drawings.

[0021] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0022] Referring to Figure 1 and Figure 2 As shown, the present utility model provides a reusable wedge-locking expansion bolt, including: a screw rod 1, a reaction end cap 2, a movable sleeve 3, and a pressing nut 4.

[0023] The screw rod 1 is cylindrical. The screw rod 1 has opposite first and second ends. An external thread is formed at the second end of the screw rod.

[0024] The reaction end cap 2 is disc-shaped. The outer diameter dimension of the reaction end cap is larger than the outer diameter dimension of the screw rod. The reaction end cap is coaxially arranged with the screw rod.

[0025] The reaction end cap 2 has opposite first end face 20 and second end face. The first end face 20 is inclined, that is, the thickness of the reaction end cap gradually decreases from one side of the reaction end cap to the other side. The first end of the screw rod 1 is connected to the first end face 20 of the reaction end cap.

[0026] The movable sleeve 3 is movably sleeved on the screw rod 1. The inner diameter dimension of the movable sleeve 3 is larger than the outer diameter dimension of the screw rod 1. The outer diameter dimension of the movable sleeve 3 is adapted to the outer diameter dimension of the reaction end cap 2. The movable sleeve can move along the axial or radial direction of the screw rod.

[0027] The movable sleeve 3 has opposite third end face 30 and fourth end face. The third end face 30 is inclined, that is, the length of the movable sleeve gradually decreases from one side of the movable sleeve to the other side. The inclination angle of the third end face 30 of the movable sleeve is adapted to the inclination angle of the first end face 20 of the reaction end cap. The third end face 30 abuts against the first end face 20.

[0028] The pressing nut 4 is screwed onto the screw rod 1. The pressing nut 4 presses against the fourth end face to make the reaction end cap 2 and the movable sleeve 3 arranged out of alignment.

[0029] A locking nut 5 is screwed onto the second end of the screw rod 1. The locking nut 5 abuts against one end of the pressing nut 4 away from the movable sleeve 3 to prevent the pressing nut 4 from retreating.

[0030] During use, in the expansion bolt hole on the wall, the inner diameter of the expansion bolt hole is slightly larger than the outer diameter of the reaction end cap. After the reusable wedge-locking expansion bolt of the present invention is inserted into the expansion bolt hole in the wall, the pressing nut is rotated, and the pressing nut pushes the movable sleeve towards the bottom of the expansion bolt hole, so that the central axis of the movable sleeve is misaligned with the central axis of the reaction end cap (i.e., they are not coaxial), and further, one side of the reaction end cap and the side of the movable sleeve away from the reaction end cap are respectively pressed against the opposite sides of the hole wall of the expansion bolt hole.

[0031] The reusable wedge-locking expansion bolt of the present invention is easy to disassemble, does not damage the wall during removal, and can be reused, reducing the engineering construction cost and improving the removal efficiency and reuse rate of the expansion bolt during construction.

[0032] As a preferred embodiment, a bearing flange 31 is formed by extending the outer edge of the fourth end face of the movable sleeve 3. The pressing nut 4 presses against the bearing flange 31.

[0033] In this embodiment, a gasket 6 is provided between the pressing nut 4 and the anti-loosening nut 5.

[0034] In this embodiment, one end of the screw rod is provided with a thread, and the other end is provided with a reaction end cap. The inclination angle of the inclined end cap of the reaction end cap is 20°. The diameter of the reaction end cap is 8 mm thicker than that of the screw rod, and the side surface of the reaction end cap has patterns for increasing the friction force.

[0035] The length of the movable sleeve is 60 mm, and it is provided with a 20° inclined end face adapted to the inclined end face of the reaction end cap. The inner diameter of the movable sleeve is slightly thicker than the diameter of the screw rod by 4 mm, and the wall thickness is 2 mm. The side surface of the movable sleeve is also provided with patterns for increasing the friction force. A 3-mm-thick bearing flange is provided at the bottom of the movable sleeve.

[0036] The pressing nut is arranged inside for controlling the tightening and loosening of the movable sleeve, and the anti-loosening nut is arranged outside for fastening the external component.

[0037] Before use, the pressing nut is loosened, and the movable sleeve is inserted into the expansion bolt hole along with the screw rod.

[0038] During use, the pressing nut is tightened, causing relative displacement of the reaction end cap and the movable sleeve along the inclined end cap. The side wall of one side of the reaction end cap and the side wall of one side of the movable sleeve form static friction with the inner wall of the expansion bolt hole, locking the screw rod in the expansion bolt hole.

[0039] During removal, first loosen the pressing nut and the anti-loosening nut, and then gently tap the screw rod inward to make the extrusion at the inclined surface and the side wall disappear, and the static friction force disappear, and the movable sleeve is pulled out along with the screw rod.

[0040] The reusable wedge-locking expansion bolt of the present utility model utilizes the cooperation of a screw rod, a movable sleeve, and a pressing nut to control contraction and relaxation. With the inclined end face of the wedge between the movable sleeve and the reaction end cap as the core structure, when the two are tightened against the inclined end cap, they are mutually expanded and displaced, forming frictional fixation with the inner wall of the expansion bolt hole. When relaxed, gently hitting the screw rod inward can easily remove it, thus forming a reusable wedge-locking expansion bolt.

[0041] The reusable wedge-locking expansion bolt of the present utility model is a more convenient, reliable, and reusable expansion bolt, which solves the problems of difficult disassembly, easy damage to the wall, and waste of resources of traditional expansion bolts at the construction site. The standardized assembled design not only makes the assembly operation simple during processing, firm and reliable during use, and easy to remove without damage during disassembly, but also can meet the requirement of reusable use, conforms to the concept of green sustainable development, and can be applied to various fastening operations.

[0042] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principles. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A rotatable wedge-shaped locking expansion bolt, characterized in that: include: a screw having opposing first and second ends; A reaction force end cap, wherein the reaction force end cap has a first end face and a second end face opposite to each other, the first end face is inclined, and the first end of the screw rod is connected to the first end face; A movable sleeve, movably sleeved on the screw, the inner diameter of the movable sleeve is larger than the outer diameter of the screw, the outer diameter of the movable sleeve is adapted to the outer diameter of the reaction end cap, the movable sleeve has a third end face and a fourth end face opposite to each other, the third end face is inclined, the inclination angle of the third end face is adapted to the inclination angle of the first end face, and the third end face abuts against the first end face; A pressing nut, threadedly engaged with the screw rod, the pressing nut presses against the fourth end surface to cause the reaction end cap and the movable sleeve to be misaligned; A backstop nut is threadedly engaged with the second end of the screw rod, and the backstop nut abuts against an end of the pressing nut away from the movable sleeve to prevent the pressing nut from retreating.

2. The rotatable wedge-shaped locking expansion bolt according to claim 1, characterized in that: The outer edge of the fourth end surface of the movable sleeve extends to form a pressure-bearing flange, and the pressing nut presses against the pressure-bearing flange.

3. The rotatable wedge-shaped locking expansion bolt according to claim 1, characterized in that: A gasket is provided between the pressing nut and the stop nut.

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